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K = 0.731
All model prices

Claude Opus 5 vs Gemini 4 Argon API pricing

For a chat message (1K input, 500 output), Gemini 4 Argon costs $0.007 per request and Claude Opus 5 costs $0.0175, so Gemini 4 Argon is about 2.5× cheaper.

On the overall leaderboard Claude Opus 5 ranks #7 and Gemini 4 Argon ranks #3.

Prices are the standard pay-as-you-go prices in OpenRouter's public model list, with input at the cache-miss price. Models OpenRouter does not list use the vendor's official price; those listed in CNY are converted to USD at this round's exchange rate.

Work it out for your own usageSee the model leaderboard

Prices and rankings

USD per million tokensClaude Opus 5Gemini 4 Argon
Input$5$2
Output$25$10
Cached input$0.5$0.1
ProviderAnthropicGoogle
Release date2026-07-242026-09-30
Overall rank#7#3
Coding rank#6#13
Reasoning rank#9—
Knowledge rank#15#1
Professional work rank#6#1
Verified2026-10-192026-10-19
Price sourcePrice sourcePrice source

Cost per request by usage

Without cache discounts or batch pricing.

UsageClaude Opus 5Gemini 4 ArgonDifference
Chat message1K in / 500 out$0.0175$17.5 per 1,000$0.007$7 per 1,000Gemini 4 Argon is 2.5× cheaper
Long document100K in / 2K out$0.55$550 per 1,000$0.22$220 per 1,000Gemini 4 Argon is 2.5× cheaper
Agent session500K in / 50K out$3.75$3,750 per 1,000$1.5$1,500 per 1,000Gemini 4 Argon is 2.5× cheaper

More price comparisons

Claude Opus 5 vs other models

Gemini 4 Argon vs other models